[Public-List] Public-List Digest, Vol 4511, Issue 1
Mike Meinhold
meinhold272 at gmail.com
Thu Jun 20 16:33:49 PDT 2024
I found that the Beta 16 was a very close match to the Atomic 4 in terms
of prop RPM and delivered power at the max practical horse power. This is
borne out by my experience with the Beta 16 and my original 13x7 2- blade
Mike
Rinn Duin #272
On Wed, Jun 19, 2024 at 19:23 John Johnston via Public-List <
public-list at lists.alberg30.org> wrote:
> Thanks George
> Sent from my iPad
>
> > On Jun 19, 2024, at 6:10 PM, George Dinwiddie via Public-List <
> public-list at lists.alberg30.org> wrote:
> >
> > On 6/19/24 5:07 PM, John Johnston via Public-List wrote:
> >> Isn’t the two blade prop based on being driven by an Atomic 4, or
> similar engine that has no gear reduction and therefore spins much faster?
> >
> > The two-blades is to reduce drag while sailing, especially if you line
> up the prop with the keel.
> >
> > The 7" pitch is for the faster turning prop shaft. For a diesel, you
> probably want a 10" pitch or so.
> >
> > - George
> >
> > --
> > ----------------------------------------------------------------------
> > When I remember bygone days George Dinwiddie
> > I think how evening follows morn; gdinwiddie at alberg30.org
> > So many I loved were not yet dead, http://www.Alberg30.org
> > So many I love were not yet born. also see:
> > 'The Middle' by Ogden Nash http://idiacomputing.com
> > ----------------------------------------------------------------------
> >
> >
> >
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